docs: Update index.rst (WeblateOrg#13420)

Landing page update to show a couple of user guides.

Co-authored-by: Michal Čihař <[email protected]>
Co-authored-by: Benjamin Alan Jamie <[email protected]>

docs/index.rst

@@ -23,13 +23,32 @@ Weblate Documentation
      Weblate.
 
 Welcome to the official documentation of `Weblate <https://weblate.org>`_, the
-libre software web-based continuous localization system. If you are new to this
-documentation, we recommend that you read the :doc:`user/basic` to get an
-overview of what Weblate does.
+libre software web-based continuous localization system.
 
 The table of contents in the sidebar should let you easily access the documentation
 for your topic of interest. You can also use the search function in the top-left corner.
 
+First time here?
+-----------------
+Read the :doc:`user/basic` to get an overview of what Weblate does.
+
+Joining a translation project
+------------------------------
+If you would like to contribute to a project as a translator, read about :doc:`user/translating`.
+
+Starting a translation project
+-------------------------------
+For starting your own project on our cloud service Hosted Webalte, refer to :doc:`admin/projects`.
+For self-hosting your own Weblate clone, read our :doc:`admin/install`.
+
+FAQ
+----
+Check our :doc:`faq`.
+
+Community
+----------
+Learn more about :ref:`contributing`.
+
 .. toctree::
     :caption: User docs
     :maxdepth: 1